Forty six years ago today, Neil Armstrong and Buzz Aldrin became the first two people to walk on the Moon, and Armstrong snapped this iconic photo of Aldrin (and of himself, too—that tiny little astronaut reflected in the visor is Armstrong). But it wasn’t until today that Aldrin finally gave it the perfect caption.

Happy 46th, Apollo 11.

Correction: An earlier version of this article incorrectly said this was the 40th anniversary.